{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/85747?format=json","vulnerability_id":"VCID-vpsy-4w91-g7fw","summary":"The MStore API plugin for WordPress is vulnerable to  Insecure Direct Object Reference in all versions up to, and including, 4.18.3. This is due to the update_user_profile() function in controllers/flutter-user.php processing the 'meta_data' JSON parameter without any allowlist, blocklist, or validation of meta keys. The function reads raw JSON from php://input (line 1012), decodes it (line 1013), authenticates the user via cookie validation (line 1015), and then directly iterates over the user-supplied meta_data array passing arbitrary keys and values to update_user_meta() (line 1080) with no sanitization or restrictions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary user meta fields on their own accounts, including sensitive fields like wp_user_level (to escalate to administrator-level legacy checks), plugin-specific authorization flags (e.g., _wpuf_user_active, aiowps_account_status), and billing/profile fields with unsanitized values (potentially enabling Stored XSS in admin contexts). Note that wp_capabilities cannot be directly exploited this way because it requires a serialized array value, but wp_user_level (a simple integer) and numerous plugin-specific meta keys are exploitable.","aliases":[{"alias":"CVE-2026-3568"}],"fixed_packages":[],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-3568","reference_id":"","reference_type":"","scores":[{"value":"0.00042","scoring_system":"epss","scoring_elements":"0.13055","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-3568"},{"reference_url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve","reference_id":"a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve"},{"reference_url":"https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=","reference_id":"changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail="},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012","reference_id":"flutter-user.php#L1012","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012"},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1012","reference_id":"flutter-user.php#L1012","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1012"},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1078","reference_id":"flutter-user.php#L1078","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1078"},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078","reference_id":"flutter-user.php#L1078","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078"},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1080","reference_id":"flutter-user.php#L1080","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1080"},{"reference_url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080","reference_id":"flutter-user.php#L1080","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-09T12:59:03Z/"}],"url":"https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080"}],"weaknesses":[{"cwe_id":639,"name":"Authorization Bypass Through User-Controlled Key","description":"The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data."}],"exploits":[],"severity_range_score":"4.3 - 4.3","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-vpsy-4w91-g7fw"}